Anachis lyrata (G.B. I Sowerby, 1832)
Anachis lyrata veleda (P.L. Duclos, 1846)
Decipifus lyrta (F.C. Baker, G.D. Hanna& A.M. Strong, 1938)
Mitrella macandrewi (G.B. III Sowerby, 1905)
Mitrella mackayi (FOSSIL) (H.H. Suter, 1917 †)
Decipifus macleani A.M. Keen, 1971
Zafrona macronata L.R.L. Simone, 2009
Parametaria macrostoma (L.A. Reeve, 1858)
Mitrella maculafasciata K. Monsecour & D. Monsecour,2016
Steironepion maculata (C.B. Adams, 1850)
Strombina maculosa (G.B. I Sowerby, 1832)
Spiralta maculosa (FOSSIL) (I, 1832 †)
Mitrella maestratii D. Monsecour & D. Monsecour,2011
Zemitrella mahoenuica (FOSSIL) C.R. Laws, 1935 †
Columbella major G.B. I Sowerby, 1832
Seminella makemoensis K. Monsecour & D. Monsecour,2015
Lirastrombina mareana (FOSSIL) (N.E. Weisbord, 1962 †)
Graphicomassa margarita (L.A. Reeve, 1859)
Macrozafra mariae A.W.B. Powell, 1940
Anachis mariopenai W.K. Weyrauch
Zafra marisrubris E. Neubert, 1998
Strombina marksi L.G. Hertlein & A.M. Strong,1951
Mitrella marliesbeckerae (FOSSIL) C. Nielsen, 2003 †
Pardalinops marmorata (J.E. Gray, 1839)
Metanachis marquesa (J.S. Gaskoin, 1851)
Columbella marrae E.F. Garcia, 1999
Mitrella martensi (C.E. Lischke, 1871)
Anachis martinicensis (J. Pelorce, 2013)
Pyreneola mascarenensis J. Drivas & M. Jay, 1990
Strombina matima (FOSSIL) A.A. Olsson, 1922 †
Ruthia mazatlanica D.R. Shasky, 1970
Dorsina melajoensis (FOSSIL) (P.O. Jung, 1969 †)
Nassarina melanosticta (H.A. Pilsbry & H.N. Lowe,1932)
Zafra melitoma (J.C. Melvill & R. Standen,1901)
Mitrella melvilli (J. Knudsen, 1956)